COMBUSTION BURNER AND COMBUSTION DEVICE PROVIDED WITH SAME

摘要

A combustion burner which comprises a mixture nozzle, a gas feeding nozzle and guide means. The mixture nozzle extends into a furnace to define a mixture flow passage, through which a mixture containing a powder solid fuel and a gas for carrying the solid fuel flows. A tip end of the mixture nozzle is diverged such that a flow cross sectional area of the mixture flow passage gradually increases along a flow of the mixture. The gas feeding nozzle is provided to radially surround the mixture nozzle to define between it and the mixture nozzle a gas flow passage, through which a gas containing oxygen for combustion flows toward the furnace. The guide means is provided upstream of a diverging portion in a mixture flow within the mixture nozzle so that the mixture flows linearly along an inner peripheral surface of the diverging portion of the mixture nozzle.